Improvement in arched drains



G. R.- MOORE.

Armed-Drains.

'UNITED STATEs PATENT OFFICE.

GEORGE EODNEY MOORE, OE LYoNs, rowA.

IMPROVEMENT IN ARCHED DRAINS.

Specification forming part of Letters Patent No. 129,578, dated July 16,1872.

Specification describing certain Improvements in Drains, invented byGEO. RODNEY MOORE, of Lyons, in the county of Clinton and State of Iowa.

The first part of my invention relates to an arched passage for liquidsto be drained from any sink or vessel in which hard substances may befound` in mixture, whenever it may be desired to draw olio the sameseparately from those substances, whether sediment or iloating.

I have ascertained the principles upon which an arched passage may beconstructed to be capable of holding liquid for a very considerable timein balance or selfpoised by the air only. I do not use a true siphon,but the arms of the up-and-down portions or parts of the arched passageI make are of equal length for the purpose of so balancing the liquidwith which they are filled that'no tendency to flow will exist in eitherof them, and for want of unbalance neither side empties. Thus, when avessel is drained to'a level of the lower end of the outside arm of thearched passage equilibrium takes place; the arched passage remainsfilled and ready for immediate use again. Its automatic balancingconstitutes a degree of constancy sufficient for all ordinary purposes,especially as it may be easily refilled by holding a temporary guardabout the inside arm and furnishing a depth of liquid equal to thelength of said arm. I have ascertained that the inlets and outlets ofthis arched passage should be about the diameter of a natural drop ofthe liquid used, and that air will not as readily rise up through waterand other liquids in a tube of that size as it does through larger ones.I increase the capacity of the drain to any desired extent by increasingthe number of the tubes, or, at least, their inlets and outlets. Whenthis balanced siphonic tube or combination of tubes is used to connect asink with a drain-pipe, care should be taken that no direct touch orinterference of the two is allowed, unless air is introduced within, forair is the cut-o, and its introduction just at this point distinguishesmy arched passage from the true siphon and gives it this useful functionof self-equilibrium, which the ordinary siphon does not possess.

In an inverted arch, which is the usual form, not only is clogging bydeposits an evil, but the force required to overcome the inertia of thewater greatly impedesthe efficiency of the apparatus.

An expansion of the drain-pipe or head, as shown in the accompanyingdrawing, may hold sufficient air for a cut-oil' of the stream, and thenthe whole may be made air-tight around the outside 4arm of the passage;and this brings me to the second part of my invention: In this conditionmy arched passage or drain is a trap of foul air from the ordinarydrain-pipe.

Figure 1 is a vertical transverse section of a common sink with myinvention applied in one mode. A is a drain-pipe; B, my arched drain orpassage for liquids. G is a common sink; D, legs 5 E, an iron platetoclosethe opening from the sink to the drain-pipe. F is an air-chamber.Fig. 2 shows B E in perspective. Fig. 3 is a perspective view from thelower side of Fig. 2. I I I are inlets, and O O O outlets of the archeddrain or passage from the sink to the regular drain.

I claim as my invention- 1. An arched drain in which liquid may beretained in equipoise when a ow is not required, substantially as andfor the purpose herein set forth.

2. The said drain,- in combination with a drain-pipe, substantially asand for the puI'-,

pose herein set forth.

GEO. R. MOORE.

Witnesses:

J. N. CRoss, I. '.B. OHOATE.

